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161 lines
4.0 KiB
161 lines
4.0 KiB
#include "stdafx.h"
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#include "SSplitBar.h"
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#include <layout\SouiLayoutParamStruct.h>
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#include <layout\SouiLayout.h>
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namespace SOUI
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{
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SSplitBar::SSplitBar():m_bDragging(FALSE)
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,m_bResizeHostWnd(FALSE)
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,m_nSizeMin(0)
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,m_nSizeMax(0)
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,m_bVertical(FALSE)
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{
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}
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SSplitBar::~SSplitBar()
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{
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}
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LRESULT SSplitBar::OnCreate( LPVOID )
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{
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if(0 != __super::OnCreate(NULL)) return 1;
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ORIENTATION pi = m_bVertical ? Vert : Horz;
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m_nOrginPos = GetLayoutParam()->GetSpecifiedSize(pi).toPixelSize(GetScale());
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m_nTrackingPos = m_nOrginPos;
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return 0;
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}
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BOOL SSplitBar::OnSetCursor(const CPoint &pt)
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{
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HCURSOR hCursor=GETRESPROVIDER->LoadCursor(m_bVertical?IDC_SIZEWE:IDC_SIZENS);
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SetCursor(hCursor);
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return TRUE;
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}
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void SSplitBar::OnLButtonDown(UINT nFlags,CPoint pt)
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{
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SWindow::OnLButtonDown(nFlags, pt);
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m_ptDragPrev = pt;
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m_bDragging = TRUE;
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}
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void SSplitBar::OnLButtonUp(UINT nFlags,CPoint pt)
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{
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SWindow::OnLButtonUp(nFlags, pt);
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m_bDragging = FALSE;
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ORIENTATION pi = m_bVertical ? Vert : Horz;
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m_nOrginPos = GetLayoutParam()->GetSpecifiedSize(pi).toPixelSize(GetScale());
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m_nTrackingPos = m_nOrginPos;
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}
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void SSplitBar::OnMouseMove(UINT nFlags,CPoint pt)
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{
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SWindow::OnMouseMove(nFlags, pt);
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static int nLastUpdateTicks = 0;
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int now = GetTickCount();
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if (now - nLastUpdateTicks < 30 || !m_bDragging)
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{
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return;
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}
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nLastUpdateTicks = now;
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int nWindowOffset = 0;
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int nOffset = 0;
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// 计算两次鼠标的位置偏差
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if (m_bVertical)
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nOffset = pt.x - m_ptDragPrev.x;
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else
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nOffset = pt.y - m_ptDragPrev.y;
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// 计算分隔栏新的位置
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//SwndLayout * pLayout = GetLayout();
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ORIENTATION pi = m_bVertical ? Vert : Horz;
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SouiLayoutParamStruct* pLayout = (SouiLayoutParamStruct*)GetLayoutParamT<SouiLayoutParam>()->GetRawData();
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int nNewPos = m_nOrginPos + nOffset * pLayout->posLeft.cMinus;
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/*
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* - 有一种情况要特殊处理:既要修改hostwnd的尺寸,top/left又是以-XXX的方式定义。
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* 这里的逻辑比较复杂，我自己也搞得很晕@_@
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*
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* - 因为在需要修改宿主窗口的情况下，left/top如果以right/bottom为锚点，在修改了hostwnd的尺寸后,
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* 不需要再修改位置信息，否则在逻辑上位置信息会被叠加计算。
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* 举个例子：假如原始的y pos位置是-100，窗口的高度为300，此时y的位置是200(相对底部对齐)
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* 拖动分隔条往上移动了5个px，如果位置信息被改成了-105，窗口减少了5px，变成了295。最后计算出来
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* 的位置变成了190
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*
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* - 在这种情况下，不受maxsize和minisize的控制。因为分隔栏和bottom/right的相对位置不变，所以从
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* 使用的角度讲，是没有超出 [maxsize,minisize] 的范围的
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*/
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HWND hWnd = GetContainer()->GetHostHwnd();
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BOOL bZoomed = ::IsZoomed(hWnd);
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BOOL bResizeWnd = m_bResizeHostWnd && !bZoomed;
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if (!(bResizeWnd && pLayout->posLeft.cMinus < 0))
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{
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if (nNewPos > m_nSizeMax)
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nNewPos = m_nSizeMax;
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if (nNewPos < m_nSizeMin)
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nNewPos = m_nSizeMin;
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if (nNewPos == pLayout->posLeft.nPos.toPixelSize(100))
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return;
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pLayout->posLeft.nPos = nNewPos;
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}
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// 调整窗口
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nWindowOffset = nNewPos - m_nTrackingPos;
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nWindowOffset *= pLayout->posLeft.cMinus;
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m_nTrackingPos = nNewPos;
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if (bResizeWnd)
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ResizeHostWindow(nWindowOffset);
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else
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RequestRelayout();
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}
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void SSplitBar::ResizeHostWindow(int nOffset)
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{
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if ( m_bResizeHostWnd && nOffset != 0)
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{
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HWND hWnd = GetContainer()->GetHostHwnd();
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CRect rcWnd;
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::GetWindowRect(hWnd, rcWnd);
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if (m_bVertical)
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{
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::MoveWindow(hWnd,
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rcWnd.left,
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rcWnd.top,
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rcWnd.Width() + nOffset,
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rcWnd.Height(),
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TRUE);
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}
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else
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{
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::MoveWindow(hWnd,
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rcWnd.left,
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rcWnd.top,
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rcWnd.Width(),
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rcWnd.Height() + nOffset,
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TRUE);
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}
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}
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}
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}//namespace SOUI
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